What is best drug to start ovulation after Depo. 41 yrs. old-Want 2nd child?

I will be 42 in Jan. Before I had gastric bypass I was 450 lbs. and now I have gotten down to 213. I have been on the Depo Provera shot for 6 yrs. with no period at all. Took it because of heavy bleeding and irregular cycles. I desperately want to get pregnant before it's too late (who knows if it is already) I am on a ton of medications for heart problems, etc.I have started metformin, DHA, Evening of Primrose Oil, etc. getting ready for pregnancy. I have a 15 yr. old daughter and something just clicked in my head a few months ago wanting another child. I just can't wait a yr. or more to start ovulating again. At my age I don't want to sound stupid but I do need to ovulate in order to get pregnant and do I need to get a period beforehand? Is there a good medication that will start ovulation sooner than later or to at least get my period back? Thank you in advance for the help.

Added 4 Dec 2010:

I should have also added that I have had 3 hear attacks. The last one was about 5 yrs. ago after the gastric bypass.